Ship structure



J. H. LINDROOS SHIP STRUCTURE.

APPLICATION FILEDJUNE 1s. 192|;

Patented May 23,1922.

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A TTOR/VEY J. H. LINDROOS SHIP STRUCTURE. APPLICATION r|LEnJuNE16,192|.

Patented May 23, 1922.

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Specification of Letters Patent.

Patented May 23, T9223.

Application filed June 16, 1921. SerialNo. 477,919.

To all whom t may concern:

Be it known that l, JOHN HJALMAR LiNnRoos, a citizen of the United States, residing in Brooklyn, in the county of Kings and State of New York, yhave invented certain new and useful Improvements in Ship Structures, of which the following is a full, clear, and concise description.

My invention relates to ship structures, my more' particular purpose being to strengthen the hull or analogous body member of the ship by bracing the same either internally or externally, or both internally and externally, in such manner as to render the structure as a whole exceedingly strong and yet having a proper amount of fiexi bility.

Stated more specifically, my invention contemplatesa hull for a ship, barge, boat or analogous vessel, made up in part of boards, planks, staves or the like, arranged somewhat after the manner of staves in a barrel, and so arranged that they become tighter relatively to each other as'pressure is applied to them by the water in which the hull floats, as well as when they are forced radially inward by mechanical means constituting a part of my invention.

My invention further comprehends various details of construction more or less remotely associated with the hull and its connections.

Reference is made to the accompanying drawings forming a part of this specification, and in which like reference characters indicate like parts throughout the several figures. Y

Figure 1 is a cross section through my iinproved device, and is taken upon the line l--l of Figure 2, looking in the direction indicated by the arrows. i

Figure 2 is a fragmentary plan view of the hull. A

Figure 3 is a cross section somewhat similar to Figure l, but showing a form of my device differing from that contemplated by Figure l.

Figure 4 is a fragmentary section, upon a larger scale than that contemplated by Figure 3, and showing a detail of the construe tion of the mechanism shown in Figure 3.

I will first describe the form of my invention contemplated by Figures l and 2.

The hull as a whole is shown at 5, and is here shown as floating in water G.

Stringer 9 and The hull is made up mostly of boards 7, each having in cross section the form of a stave, the hull as a whole having the general curvature indicated, or being circular' or elliptical, as desired.

Incorporated within the structure of the hull andv extending along the top thereof are stringers 9, lO, held together by bolts ll that is, cach bolt ll extending through a a Stringer l0. The hatch doors appear at l2, and may be opened and closed in the usual or any preferred manner.

The hull carries a narrow deck 13, ol considerable length and having fthe general form of a running board, interrupted at intervals by the hatch doors. l'lxtending upwardly from the deck 1S are standards 14.-, which may constitute parts of a superstructure to be carried by the hull.

rlhe hull carries a number of stringers lf, serving to some extent as keels, and which l conveniently designate as keel stringers.

Located within the hull, and disposed near the bottom thereof, is a flooring 1G, serving as a deck.

Disposed centrally within the hull is a brace plate 17, made preferably of metal. Radiating outwardly from this brace plate are a number of tie rods 1S, each made in two parts connected by a turnbuckle 19. Each tie rod is swiveled to a stirrup 20, the latter being secured directly to the inner surface of the hull. The inner ends of the tie rods 'are secured to the brace plate 17 by means of rivets 2l, as indicated in Figure l.

lVhenever the turubucklcs are tightened` the boards 7 are forced inwardly and thus crowded together, like the stares of a barrel. To the extent that the )rcssure of the water G is exerted upon the boards, they are forced inwardly and thus crowded together, so that the water pressure has a tendency to act in the manner of the tie rods, to the extent at least of tightening the boards` like the staves of a barrel whenever the latter are pressed radially inward. This is a feature of considerable importance especially in instances where the hull sits deep in the water or where it is completely submerged.

My improved hull is thus peculiarly adapted for complete submersion, because its construction is such that the increased water pressure, due to submersion, serves as a means for crowding the boards 7 together edge to edge, so as within reasonable limits to render the hull more completely watertight than would otherwise be the case.

In the form shown in Figures 3 and 4, I place on the outside of the hull a number of band sections 22, 23, 2l, each provided with outwardly-turned end portions 25, 26, the end portion 25 ot one section being contiguous to the end portion 2G ol the next contiguous section, and connected therewith by a bolt 27. The several band. sections Q2, 23, 24, thus connected together, constitute a composite band more or less analogous to a barrel hoop, The band may be virtually expanded or contracted by loosening or tightening the bolts 2 7.V When the band is thus contracted it grips the boards 7 tightly together, the action being somewhat analogous to that of gripping a barrel tightly by tightening the hoops thereupon. The composite band encircling the hull co-acts with the tie rods 1S and parts immediately associated therewith, for the purpose of forcing the boards 7 together edgewise in the manner above described, and `for the purpose indicated. The arrangement and action of the drit bolts 8 may be readily understood from Figure 4L. Each dritt bolt is forced through at` least two thicknesses of the boards 7; that is, through two of the boards, edge to edge; and the dritt bolts are staggered, as ndicated by full and dottedlines'in Figure et, and thus distributed to better advantage.

IVhile I show only la single brace plate and only one of the composite bands used for encircling the hull, it will be understood that any reasonable number can be employed.V

I do not limit myself to the precise mechanism shown, as variations may be made therein without departing from my invention, the scope ot vwhich is commensurate with my claims.V Neither do I limit myself to any precise use to be made of my improved hull, as obviously it can be used for many kinds of vessels, including ships, boats, barges, buoys, submarines and other submersible cratt, and in lact in almost alll relations where a hull can be employed.

I-Iaving thus described my invention, what Iclaim as new and desire to secure by Letters Patent is as follows:

l. In a device of the character described, a hull comprising a number of boards fitted :together edge to edge and secured together in the proximate form ot' a'cylinder, a. plurality oit tierods connected with said cylinder and extending radially inward therefrom, and a brace plate connected with said tie rods at the inner ends thereof.

2. A hull for ships and the like, comprising a number ot boards litted together edge to edge and formed into the general proximate form of a cylinder, a band girdlingthe substantially,cylindrical member thus formed, a plurality of tie rods connected with the interior of said cylinder and. eX-

tending radially inward, a-brace plate to` which said tie rods are secured, and means controllable at the will ot the operatorffor virtually lengthening andl shortening said tie rods.

8. A hull for shipsor the like, comprising a number of boards fitted togetherv edge to edge and formed into a hollow member having the general proximateform of a cylinder, a brace plate located within said hollow member, tie rods secured to said hollow member and extending radially inward therefrom and connected to said brace plate so as to support the latter, a band girdling low member, tie rodssecuredrto said braceV plate, a turnbuckle for each .tie rod, astirrup swiveled tol each tie rod, the several stirrups each being secured rigidly within said hollow member, and a metallic bandenc-i'rcling said hollow member.

5. A hull for ships or the like, comprising a plurality of boards each having in cross section the form of a sector, said boards being fitted together edgeA to edge so that the several consecutive sectors form a curved wall, the boards being secured together, a plurality of stirrups each secured to the inner surface of the curved wall, a plurality ort tie rods each connectedwith oner ot said stir'rups, each ,tie rod being provided with a cturnbuckle;whereby it maybe virtually lengthened or shortened, and a brace plate common to all of saiditievrods, said tierods being secured to said brace plate and radi-V ating therefrom.

JOHN HJaL-Man LrNDRoos; 

